PALETTE KNIVES
PAINTERS should adopt horn palette knives instead of steel palette knives. To illustrate the reason for this—if Naples Yellow be taken and smoothed out with a steel knife, the Naples Yellow turns Brown and Black in streaks, because there is a chemical action between the steel and the chemical composition of the Naples Yellow. This is true of many colors; and where painters are inclined to do some painting with knives instead of brushes, it is preferable to use a horn or hard rubber knife, because no decomposition can possibly take place.